D250E Series II and D300E Series II Articulated Trucks Power Train Caterpillar

Transmission Hydraulic Control Valve - Remove

Usage:

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	137-7575	Link Bracket	2

Start By:

Remove the cab. Refer to Disassembly and Assembly, SENR9129, "Cab - Remove" .

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of all fluids according to local regulations and mandates.

Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.

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Illustration 1	g00518545

Disconnect hydraulic hoses (1) and (6) from adapter block (2) . Remove four bolts (5) , the washers and two half clamps (3) in order to disconnect hydraulic hose (4) from adapter block (2) .

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Illustration 2	g00518605

Remove four bolts (9) , the washers and two half clamps (7) in order to disconnect hydraulic hose (8) from the transmission oil filter.

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Illustration 3	g00518620

Remove four bolts (11) , the washers and two half clamps (13) in order to disconnect hydraulic hose (12) from suspension accumulator (10) . Remove four bolts (16) , the washers and two half clamps (15) in order to disconnect hydraulic hose (14) from suspension accumulator (10) .

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Illustration 4	g00518631

Disconnect electrical connectors (17) and (20) . Remove allen head screw (19) and disconnect electrical connectors (18) .

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Illustration 5	g00518632

Disconnect electrical connector (21) .

Drain the oil from the transmission. the capacity of the transmission is 60 L (16 US gal) .

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Illustration 6	g00518635

Remove two nuts (23) , the washers and the U-bolt that secures bracket (22) to the exhaust system. Remove four bolts (25) and the washers that secure bracket (22) to crossbar (24) . Remove bracket (22) from the crossbar and the exhaust system.

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Illustration 7	g00518788

Remove bolt (29) , the washer and hose clamp (30) that secures hose bundle (26) to bracket (27) . Remove two bolts (28) and the washers that secure bracket (27) to the machine frame.

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Illustration 8	g00518637

Attach a nylon lifting strap (32) and a hoist to suspension accumulator (10) . Remove two bolts (31) , the washers and the spacers that secure suspension accumulator (10) and crossbar (24) to the mounting bracket. Use the hoist in order to remove suspension accumulator (10) from crossbar (24) .

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Illustration 9	g00518640

Attach a nylon lifting strap (34) and a hoist to crossbar (24) . Remove four bolts (33) , the washers and four spacers (35) that secure crossbar (24) to mounting post (38) . Remove two bolts (36) , the washers and two spacers (37) that secure crossbar (24) to mounting post (38) .

Use the hoist in order to remove crossbar (24) from two mounting posts (38) .

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Illustration 10	g00518642

Remove two wire clips (40) . Disconnect electric connectors (39) , (41) and (42) . Move the wires aside.

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Illustration 11	g00518958

Disconnect hydraulic hose (44) from speed shift solenoid (43) .

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Illustration 12	g00518649

Remove ten bolts (47) and the washers that secure cover (48) to cover (45) . Remove 12 bolts (46) and the washers that secure cover (45) to valve housing (49) . Remove cover (48) and the gasket from cover (45) .

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Illustration 13	g00518650

Remove two bolts (51) that secure electronic control (50) to cover (45) . Slowly remove electronic control (50) from cover (45) , shaft (52) and the control valve. Note the electrical wire that is attached to the back side of electronic control (50) .

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Illustration 14	g00519682

Disconnect the electronic connector on wire (53) from electronic control (50) . Remove electronic control (50) from the machine.

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Illustration 15	g00519687

There is a gear on the bottom of shaft (52) and under cover (45) . Shaft (52) and the gear on shaft (52) will be removed as a unit with cover (45) from housing (49) . Remove cover (45) and the gasket from housing (49) .

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Illustration 16	g00519761

Remove access plug (54) and O-ring seal (55) from cover (45) . Remove retaining ring (56) that secures shaft (52) in cover (45) .

Remove shaft (52) , washer (57) and the gear from cover (45) . Remove the gear from shaft (52) .

Remove the lip seal that was under washer (57) .

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Illustration 17	g00518677

Loosen nut (58) and remove rod (60) from cam assembly (61) . Disconnect hydraulic hose (59) from the flange on the speed shift solenoid.

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Illustration 18	g00518681

Remove three bolts (62) that secure speed shift solenoid (43) to the housing. Remove speed shift solenoid (43) from the housing.

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Illustration 19	g00518683

Remove O-ring seal (63) , O-ring seal (64) and seal (65) from speed shift solenoid (43) .

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Illustration 20	g00518685

Remove the bolt (not shown) that secures pin (66) to the bottom of the housing. Remove pin (66) from cam assembly (61) . Remove cam assembly (61) from the housing.

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Illustration 21	g00518688

Remove two pins (67) and two levers (68) from the control.

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Illustration 22	g00518691

Remove bolts (69) that secure cover (70) to the hydraulic control housing. Remove cover (70) and the gasket from the housing.

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Illustration 23	g00518694

Remove bolt (71) and the washer that secures two tubes (72) in the hydraulic control.

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Illustration 24	g00518696

Remove oil supply tube (73) from the hydraulic control valve. Remove the two O-ring seals from oil supply tube (73) . Remove four bolts (74) and the washers that secure the hydraulic control valve to housing (75) .

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Illustration 25	g00518699

Loosen two nuts (76) and remove two rods (77) .

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Illustration 26	g00518701

Attach Tooling (A) , nylon lifting straps and a hoist to the hydraulic control valve. Remove hydraulic control valve (78) from housing (75) . The weight of the hydraulic control valve is 39 kg (86 lb). Remove two tubes (72) from housing (75) .